Hymenoptera aculeata collected in Algeria: the Sphegidae. 77 
tristis @ are given as 23-26 mm. only; and the author 
does not mention any difference of colour between $f and 2 
tristis, but simply says of the species “ Nigra, nonnunquam 
paullum fuscescens.” 
SPHEX FLAVIPENNIS, F. 
1 9. Médéa, on Daucus setifolius, 2. vill, 94. A. E. E. 
bf. Biskra,’ 3. 'v1,98;- B.D) Mi 
SPHEX MAXILLOSUS, F. 
Numerous f~ ff and 2 § from Biskra, Tizi Ouzou, 
Hippéne (on Ammi visnaga), Médéa (on Mentha 
rotundifolia)—April to August. A. E. E. and F. D. M. 
CERCERIS BUPRESTICIDA, Duf. 
The 2 is coloured far more brightly than normal Euro- 
pean specimens, having the whole face, collar, postscutellum, 
lateral areas of the propodeum and a pair of discal spots 
on the middle area, nearly the whole of segments 1, 3, 4, 
and 5, and a wide uninterrupted basal fascia on segm., 2 
of the abdomen above bright yellow. The femora are not 
black, but only somewhat rufescent; and ventral segments 
2 and 3 are also not black but obscurely red and marked 
with yellow. Still I can find no structural difference 
accompanying this unusual colouring. Clypeus, cordiform 
area, ventral segments, etc., are formed and sculptured 
exactly as in ordinary bupresticida; and the ¢ 2, though 
more yellow than specimens from Tirol, Corfu, etc., are 
not very much so. 
1 2. Le Tarf, on Foeniculum vulgare, 26. vii, 96. A. KE. E. 
1 gf. Biskra, on Zizyphus lotus, 3. v, 95. A. E. E. 
1 f and 1 9. Biskra, 14. and 23. v, 98. F. D. M. 
CERCERIS INSIGNIS, KI. (?) 
Klug described his sp. from the @ only, and almost 
entirely on colour-characters. The present identification 
can only be conjectural; but if the insects now to be 
recorded are not really insignis, they must at least be 
exceedingly near it. (1 feel pretty sure that ¢ricolorata, 
Spin., is a synonym of the same species. This was also 
described from a only.) As neither author sufficiently 
describes the structural characters to fix for certain the 
affinities of his species, and Schletterer has therefore been 
